White Chuck GlacierWhite Chuck GlacierWhite Chuck Glacier is located in the
Glacier Peak WildernessGlacier Peak Wilderness in the
U.S. stateU.S. state of Washington and is 3.5 mi (5.6 km) south of
Glacier Peak. The glacier is within Mount Baker-Snoqualmie National
Forest and nearly touches the White River Glacier though they are
separated by an arête off the Kololo Peaks.[2] White Chuck Glacier
has retreated significantly since the end of the Little Ice Age. From
about 1850 to 1930, the glacier thinned and by 1940, a fast rate of
retreat commenced. By 1955, the glacier had three separate termini and
by 2005, the northern terminus was gone. Several small proglacial
lakes have been left behind by the retreating glacier
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Geographic Coordinate System
A geographic coordinate system is a coordinate system used in
geography that enables every location on Earth to be specified by a
set of numbers, letters or symbols.[n 1] The coordinates are often
chosen such that one of the numbers represents a vertical position,
and two or three of the numbers represent a horizontal position
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U.S. State
A state is a constituent political entity of the United States. There
are currently 50 states, which are bound together in a union with each
other. Each state holds governmental jurisdiction over a defined
geographic territory and shares its sovereignty with the United States
federal government. Due to the shared sovereignty between each state
and the federal government,
AmericansAmericans are citizens of both the federal
republic and of the state in which they reside.[3] State citizenship
and residency are flexible, and no government approval is required to
move between states, except for persons covered by certain types of
court orders (e.g., paroled convicts and children of divorced spouses
who are sharing custody)
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Washington (state)
Washington (/ˈwɒʃɪŋtən/ ( listen)), officially the
State of Washington, is a state in the
Pacific NorthwestPacific Northwest region of the
United States. Named after George Washington, the first president of
the United States, the state was made out of the western part of the
Washington Territory, which was ceded by Britain in 1846 in accordance
with the
Oregon TreatyOregon Treaty in the settlement of the
OregonOregon boundary
dispute. It was admitted to the Union as the 42nd state in 1889.
Olympia is the state capital. Washington is sometimes referred to as
Washington State to distinguish it from Washington, D.C., the capital
of the United States, which is often shortened to Washington.
Washington is the 18th largest state with an area of 71,362 square
miles (184,827 km2), and the 13th most populous state with over
7.4 million people
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Glacier PeakGlacier PeakGlacier Peak or Dakobed (known in the Sauk-Suiattle dialect of the
LushootseedLushootseed language as "Tda-ko-buh-ba" or "Takobia"[5]) is the most
isolated of the five major stratovolcanoes (composite volcanoes) of
the Cascade Volcanic Arc in the U.S state of Washington. Located in
the
Glacier PeakGlacier Peak Wilderness, the volcano is visible from the west in
Seattle, and from the north in the higher areas of eastern suburbs of
Vancouver such as
CoquitlamCoquitlam and Port Coquitlam. The volcano is the
fourth tallest peak in Washington state, and not as much is known
about it compared to other volcanoes in the area. Local Native
Americans have recognized
Glacier PeakGlacier Peak and other Washington volcanoes
in their histories and stories
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White River Glacier (Washington)
White River Glacier is located in the Glacier Peak Wilderness in the
U.S. state of Washington. The glacier is within Wenatchee National
Forest and nearly touches Honeycomb and Suiattle Glaciers, separated
from them by an arête off the Kololo Peaks at its uppermost
reaches.[2] White River Glacier has retreated approximately
1,000 m (3,300 ft) since the end of the Little Ice Age
around the year 1850.[3]
See also[edit]List of glaciers in the United StatesReferences[edit]^ "White River Glacier". Geographic Names Information System. United
States Geological Survey. Retrieved 2012-11-30.
^ Glacier Peak East, WA (Map). TopoQwest (United States Geological
Survey Maps). Retrieved 2012-11-30.
^ Pelto, Mauri (2007). "Glacier Peak A Century Of Change". North
Cascade Glacier Climate Project. Nichols College
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Arête
An arête is a narrow ridge of rock which separates two valleys. It is
typically formed when two glaciers erode parallel U-shaped valleys.
Arêtes can also form when two glacial cirques erode headwards towards
one another, although frequently this results in a saddle-shaped pass,
called a col.[1] The edge is then sharpened by freeze-thaw weathering,
and the slope on either side of the arete steepened through mass
wasting events and the erosion of exposed, unstable rock.[2] The word
‘arête’ is actually French for edge or ridge; similar features in
the
AlpsAlps are described with the German equivalent term Grat.
Where three or more cirques meet, a pyramidal peak is created.Contents1 Cleaver
2 Examples
3 See also
4 References
5 External linksCleaver[edit]
A cleaver is a type of arête that separates a unified flow of glacial
ice from its uphill side into two glaciers flanking, and flowing
parallel to, the ridge
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Terminal Moraine
A terminal moraine, also called end moraine, is a type of moraine that
forms at the snout (edge) of a glacier, marking its maximum advance.
At this point, debris that has accumulated by plucking and abrasion,
and has been pushed by the front edge of the ice, is driven no further
and instead is dumped in a heap. Because the glacier acts very much
like a conveyor belt, the longer it stays in one place, the greater
the amount of material that will be deposited. The moraine is left as
the marking point of the terminal extent of the ice.[1]
Examples[edit]
Terminal moraines are one of the most prominent types of moraines in
the Arctic
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Proglacial Lake
In geology, a proglacial lake is a lake formed either by the damming
action of a moraine during the retreat of a melting glacier, a glacial
ice dam, or by meltwater trapped against an ice sheet due to isostatic
depression of the crust around the ice.[1] At the end of the last ice
age approximately 10,000 years ago, large proglacial lakes were a
widespread feature in the northern hemisphere.Contents1 Morain-dammed
2 Ice-dammed
3 Retreating ice sheet
4 See also
5 References
6 BibliographyMorain-dammed[edit]Glacial action forming a cirque to become a tarn, upon meltingFurther information: Tarn (lake)
The receding glaciers of the tropical
AndesAndes have formed a number of
proglacial lakes, especially in the
Cordillera BlancaCordillera Blanca of Peru, where
70% of all tropical glaciers are. Several such lakes have formed
rapidly during the 20th century. These lakes may burst, creating a
hazard for zones below
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United States Geological Survey
The
United StatesUnited States Geological Survey (USGS, formerly simply Geological
Survey) is a scientific agency of the
United StatesUnited States government. The
scientists of the USGS study the landscape of the United States, its
natural resources, and the natural hazards that threaten it. The
organization has four major science disciplines, concerning biology,
geography, geology, and hydrology. The USGS is a fact-finding research
organization with no regulatory responsibility.
The USGS is a bureau of the
United StatesUnited States Department of the Interior;
it is that department's sole scientific agency. The USGS employs
approximately 8,670 people[2] and is headquartered in Reston,
Virginia
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List Of Glaciers In The United States
This is a list of glaciers existing in the United States, currently or
in recent centuries. These glaciers are located in nine states, all in
the Rocky Mountains or farther west. The southernmost named glacier
among them is the Lilliput
GlacierGlacier in Tulare County, east of the
Central Valley of California.
This is a dynamic list and may never be able to satisfy particular
standards for completeness
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